Two missing addend games and a story problem focusing on finding combinations of 9 what else could a 1st grade teacher want.
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Worksheets math grade 1 addition adding using combinations of 10.
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Use combinations of 10 to simplify adding numbers.
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8 5 8 2 3 10 3 13 all sums are between 10 and 20.
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These worksheets give practice adding two single digit numbers together mentally using combinations of ten e g.